Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Consolidated Balance Sheets (Parenthetical) [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 21.7	$ 30.4
Property and Equipment, accumulated depreciation	1,165.7	1,156.7
Intangible assets, accumulated amortization	$ 856.5	$ 817.2
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	7.5	7.5
Preferred stock, shares issued	0.0	0.0
Common stock, par value	$ 0.15	$ 0.15
Common stock, shares authorized	1,000.0	1,000.0
Common stock, shares issued	297.2	297.2
Common stock, shares outstanding	209.1	215.0
Treasury stock, shares	88.1	82.2